Почему витамин С не работает на вашей коже: 5 ошибок от дерматолога

A yellowed serum isn't a reason to throw out your vitamin C. As a dermatologist, I discuss the 5 most common mistakes I see every day at my appointments. In this video: — When a yellow bottle is normal, and when it's a signal to throw it out — Optimal concentration of L-ascorbic acid: why 20% is worse than 15% — The antioxidant cascade: vitamin C and vitamin E work many times more powerfully — The 72-hour principle: how the cumulative effect works and why you shouldn't skip it — Vitamin C derivatives: who needs an alternative to pure acid 00:00 Introduction 01:00 Mistake 1 - Oxidation: when should you throw out your serum? 2:30 AM Mistake 2 — Concentration: Optimum 10–15% 4:20 AM Mistake 3 — Antioxidant Cascade 5:46 AM Mistake 4 — The 72-Hour Principle 7:30 AM Mistake 5 — Vitamin C Derivatives 9:00 AM Final Morning Vitamin C Routine 📩 Collaboration: [email protected] #vitamins #skincare #cosmetologist #dermatologist #skincare